Microstructure and mechanical properties of a novel Cu-Fe based matrix for diamond segments

Abstract

With the purpose of reducing the cobalt content in diamond tools, Cu-Fe based matrixes were prepared by vacuum and pressure-assisted sintering under a pressure of 13 MPa at 740 , 780 and 820 . The effects of sintering temperature on microstructures and mechanical properties of the sintered matrix were investigated by X-ray diffraction analysis, electron probe micro-analyzer, and universal mechanical and digital hardness tester. Results showed that microstructures of the sintered matrix were refined; porosities in the sintered matrix became sphericallike with the increase of the sintering temperature. Densification, hardness and yield strength of the matrix sintered at 820 were 12.75 , 2.72 and 156.38 higher than that of the matrix sintered at 740 , respectively. The sintered microstructures refinement and the dispersed distribution of Co-Cr pre-alloyed powders contributed the hardness and the yield strength improvement to the Cu-Fe based matrix for diamond segments.

Microstructural Characteristics and Properties of Laser-Welded Diamond Saw Blade with 30CrMo Steel

“…Efficiently joining the composite part to the matrix is a challenging and crucial task. Various methods have been adopted to achieve effective joining between metal/diamond components and substrates, including integral sintering, brazing, radio frequency welding, vacuum welding, laser welding, and selective laser melting [7][8][9]. However, traditional integral sintering and radio frequency welding processes are not suitable for high-efficiency and high-strength joining requirements.…”